Free: Contests & Raffles.
I like to have my dogs sit in front of me on the recall, that way they are looking at me for direction.
IMO neither way is necessarily better that the other. For the type of hunting I do, I want the dog infront of me so I can cast him off after the retrieve. If, on the off chance, a bird is shot that he doesn't see I'll bring him to heel and line him up for a blind retrieve. For the ytpe of hunting HG does he wants his dog at heel so he has a better view of what is infront of him, so he brings his dog to heel.
HG is the difference between the blind retrieves that a pointer/flushing breed are sent to general area and retrievers are sent on direct line and expected to keep that line to bird during trials